Scraping/dragging can add texture and/or create shading that indicates form. This process can be repeated any number of times, and previous layers can be either dragged into and blended with a subsequent layer, and/or a previous layer can be revealed by scraping away a subsequent layer. The ways in which multiple layers will interact can become highly unpredictable, so indeterminacy becomes a prominent part of the piece.
As the artist drags paint from one area of the painting to the next, multiple unmixed colors might appear as parallel adjacent streaks. With this in mind, the direction of the dragging can be used to help indicate the form of an object being depicted.
Featured: Barely Dawn by Charles Morris